Variable-speed driving mechanism for beaming machines and like textile machines



April 28, 1953 G.'| EE $636,249

- VARIABLE-SPEED DRIVING MECHANISM FOR BEAMING MACHINES AND LIKE TEXTILE MACHINES Filed Dec. 2]., 1950 2s I! W T 22 22 27 L 24 l I .17 L L I 34H 58 29 3 H 45 2 El l0 1 1 Patented Apr. 28, 1953 STATES PATENT OFFICE YARI'ABIE SPEED DRIVINGv MECHANISM FOR BEAMING MACHINES AND LIKE TEXTILEEMACHINES Genrge-LeaDarwen; England:

ApplibafionDecembes: 21, 1950, Serial No. 202,007 Iir Great Britain September 2.7, 1949 Glaimsa 1 inventibir' of" improvements: in. variable speed driving mechanism: for beaming machines and liketextilemachines refers'to such machines in: which yarn. or thread being drawn from one body" and wound; on" to. a further body,v and in which the machine is driven: by'means of a t-rictionr clutch drive from am electromotor" through variable" gearing;

The invention has for its-object the'provi'sion: or variablev speed; driving-f mechanism which: ensures that the tension on yarn or thread being wound is: maintained constant irrespective of the vari'atiom in: the lineal; speed of the yam or thread due t c;v thew increasev diameter of the beam on other body astlieyarn on'thread' is' being wound;

Variahle spee'd driving mechanism according to the invention includes an el'ectromoton geared tether input shaft ofa; variablevspee'ddrive; the

outputshafti'of is geared to aholl'ow shaft I mounted adjacent toitha gearbox and in operat'ive association throng-Ir. chain and; sprocket mechanism with the driving member of a friction clutch; the driven member or? which i's= fast on the driving shaft ofthe beaming machine, said" hol- Iowshafth'aving'fastthereon the s-unzwheel of an epicycl-ic gem-train the revolutions- 01 which are directly related to the revolutions ofthe driving. side: of friction. clutch; a; chairs and sprocket: connection between the driven sideof th'etfriction clutch anda ocmntershaft:furnished with=a.fi'ibtionclutch coupling: driven bysaid hollow shaft one end o'i 'a centre'sha'ft journallediiirthe aforesaidliollow shaft, the opposite end of said-sens trez shaft, having fastitheraom ther annulusi ot. the

aionesaid epicyclic; train, a. chain; and; sprncket connection. between the planet. wheel carrier; of th epioyclic: gear train and. the. control screw oiz'thewariable speed drive, andimeans for-moving the afloresaid friction clutch: and. friction clutch coupling. respectively into. andout" of operation.

The invention will now be: described with: the aid of the accompanying. drawings, which illustrate dagrammatically an embodiment of the inventiorr as applied to a beaming machine;

In: the'd-tawings; Fig. l isadiagrammatic representation of an embodiment of variable speed driving mechanism according to the invention, the view being partly sectional; Fig. 2 is'a fragmentary sectional view, drawn to a larger scale, of a detail part of Fig. 1 later to be described.

The same reference characters indicate corresponding parts in both figures oi the drawings.

Variable speed driving mechanism accordin to -the invention illustrated in the drawings includes an electromotor m", the rotor shaft H of which is geared to the input: shaft" l- 2 off a variable speed drive I3, the: output shaft [4 of which'is geared toa hollow' shaft [5 mounted adjacent to the gear box. Fast on said hollow shaft [-5 is a sprocket wheel l6" wrapped by a chain [T which also wraps a further and larger sprocket wheel l8 on the driving membenm of a friction clutch 213), the driven member 2 I of which: is fast" on the driving; shaft 22 of the beam 23-.

Fast. 011 the hollow shaft f5 is the sun wheel 24* (Fig. 2 of an" epicycIic-gcar train 25', the revolotions of' the sun gear 14 being directlyrelated with the revolutions of" the drivingsid'e" of the friction clutch 20".

On the driven side of thefriction clutch 2' 0 and running at the same speed as the beam 23 is a sprocket wheel 26 wrapped by a" chain 2 1" which also wraps a further and'smaller sprocket wheel 28 on the counter shaft 29'. Fastwith the lastmentionedsprocket 2'8 is a gear wheel 30 entrained with a further gear wheel 31 ofe'qu'af size fast on one end of a centre shaft 32 j'ournalled' in the aforesaid hollow shaft I5, whereby the centre shaft 32 1s driven in reverse direction to the hollow shaft [5, the said centre shaft 32 having fast on itsoppositeend the annulus 33 (Fig. 2) offthe epicycliotrai'n 2'5;

Av friction clutch coupling 34? on the countershaft" ZQi's driven bytlie. hollow' shaft f5 through equal sizedigearwheelsfil, 36*.

The: planet'wheel. carrier 3 1" (Fig. 2 of the-epicyclic" gear train is furnished with a sprocket 38 wrapped by' av chain 39 which also wraps a sprocket wheel 4%!- onthecontrol screw 4 I" of the variable speed-drive B2 The variable speed driving mechanism as" described is arranged so that when friction maimtains 10% slip; no change occursin the-variable speed drive:

The reason for 10 slip is to make allowance forany difference" in the diameter of the beam barrels which areseldom perfectly round; and also in case the spigots or bearingsmay' be out of 'true.

The. working of the. variable speed" driving mechanism applied to a beaming machine will now be described by way of example.

The drive to the beam shaft 22 from the variable speed drive I3 is transmitted through the hollow shaft 15 and thence by a 19 tooth sprocket wheel Hi to a 57 tooth sprocket wheel M3 on the driving side of the friction clutch 20.

On the driven member 2i of the friction clutch 20 and running at the same speed as the beam 23 is a 76 tooth sprocket wheel 25 which drives a 46 tooth sprocket wheel 28 on the counter-shaft 29 and thence, by reversing gears 30, 3| of equal size, drives the centre shaft 32 and the annulus 33 of the epicyclic gear train, the sun gear 24 of which is mounted on the hollow shaft l whereby the revolutions of the sun gear 24 are directly related with the revolutions of the driving side of the friction clutch 29.

While the friction slip is maintained the sun gear 24 revolves in the opposite direction to, and at twice the speed, of the annulus 33, as the ratio of the sun gear 34 and the annulus 33 is 1 to 2 respectively, no movement of the planet wheel carrier 37 takes place.

As before stated, this carrier 31' is connected by a chain drive to the control screw 4| of the variable speed drive I 3, which does not alter under the condition of 10% slip.

When, however, the drive side 2| of the friction clutch slows do n, due to increase in the diameter of the beam, the sun gear 24 is given a lead over the annulus 33, thereby causing the planet wheel carrier 37 to rotate and, through the chain 39 and sprocket wheels 38, 49, to alter the setting of the variable speed drive control screw 4! thereby slo ing down the variable speed drive and restoring the 10% friction slip.

When the beam 23 is nearly fully wound, and only about 100 yards is left in the machine. the friction clutch 34 on the counter-shaft 29 which is driven by the hollow shaft I5 is brought into contact, by means of a handle 42, with the first of the reversing gear wheels 30, 3 I, thereby causing the centre shaft 32 to revolve at the same speed as the hollow shaft I5.

Owing to the difference in ratio between the sun gear and the annulus 33 of the epicyclic gear 25, the planet wheel carrier 31 is revolved at a fast rate in the opposite direction.

The variable speed control screw 4! revolves with the planet wheel carrier 37, and is thus re set ready for the next running,

What I claim is:

1. Variable speed driving mechanism for beaming machines including an electromotor, a gear box, a variable speed drive in said box having an input shaft geared to the rotor shaft of said electromotor and an output shaft extending from the gear box, a hollow shaft mounted adjacent to the gear box having a gear wheel fixed thereto, a gear wheel on the output shaft of said variable speed drive enmeshed with the gear wheel fixed on said hollow shaft, a beam driving shaft, a friction clutch embodying driving and driven members, the driven member of said clutch being fast on the driving shaft of the beam, a sprocket wheel fast on said hollow shaft, a further sprocket wheel fast on the driving member of said friction clutch, a chain wrapping said sprocket wheels, an epicyclic gear train including a sun wheel fast on said hollow shaft, the revolutions of said sun wheel being directly related with the revolutions of the driving side of said friction clutch, a sprocket wheel fast on the driven member of said friction clutch and running at the same speed as the beam shaft, a

countershaft adjacent to said hollow shaft, a sprocket wheel on said countershaft smaller than said sprocket wheel on the driven member, a chain wrapping said last-mentioned sprocket wheels, a friction clutch coupling on said countershaft, two meshing gear wheels of equal size respectively on said coupling and said hollow shaft, a center shaft journalled in the before-mentioned hollow shaft, two meshing gear wheels of equal size respectively fast on one end Of said center shaft and fast with the sprocket wheel on the countershaft whereby the center shaft may be driven in reverse direction to the hollow shaft, said epicyclic gear train including an annulus and a planet wheel carrier, said center shaft having fast on its opposite end the annulus of the before-mentioned epicyclic gear train, a sprocket wheel on the planet wheel carrier of said epicyclic gear train, a control screw for the variable speed drive including a shaft extending from the gear box, a sprocket wheel fast on the shaft of the control screw of the variable speed drive, a chain wrapping said last-mentioned sprocket wheels, and means for moving the aforesaid friction clutch and friction clutch coupling respectively into and out of operation;

2. A variable speed driving mechanism as claimed in claim 1 characterized in that it is so arranged that when friction maintains 10% slip no change occurs in the variable speed drive, but when the driven side of the friction clutch on the beam shaft slows down due to increase in the diameter of the beam the epicyclic gear is operated to alter the setting of the variable speed drive control screw thereby slowing down the variable speed drive and restoring the 10% friction slip.

3. Variable speed driving mechanism as claimed in claim 1 further characterized inthat when the beam is nearly fully wound, and only a certain predetermined number of yards, e. g., yards, is left in the machine, the friction clutch coupling on the countershaft is brought into operation whereby to cause the centre shaft to revolve at the same speed as the hollow shaft, when owing to the-difference in ratio between the sun gear and the annulus of the epicyclic gear the planet wheel carrier is revolved at a fast rate in the opposite direction whereby as the variable speed drive control screw revolves with the planet wheel carrier the said control screw is re-set ready for the next running. 7

. .G-EORGE LEE.

References Cited in the file of this patent UNITED STATES PATENTS Date 

